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Unity Mine

The 'Unity Mine' file is part of the G. M. Colvocoresses mining collection. Colvocoresses was a mining engineer and metallurgist in Arizona. He was General Manager of Southwest Metals Company, Humboldt, AZ. It acquired Consolidated Arizona Smelting Company by the end of 1921. In 1920, Colvocoresses was appointed receiver for Consolidated Arizona Smelting Company out of Phoenix. This collection is comprised mainly of his reports on field visits or submittals from approximately 300 Arizona properties and 100 more properties in the Southwest.